disp: msm: dp: Ensure sink supports DSC decoding of selected BPC

The sink may have limited DSC decoding support
for some BPC values. Ensure that the BPC that is
selected is within the sink's DSC capabilities.

CRs-Fixed: 2527660
Change-Id: I0692e7b606e258c3cab3de25d3b03178f4aa0294
Signed-off-by: Fuad Hossain <fhossain@codeaurora.org>